This is what the lab said to do

2. Determine the circumference of the circle.
4. For each trial, determine the period of the motion.
6. For each trial, calculate the tangential velocity of the stopper.
8. For each trial, calculate the experimental centripetal acceleration of the stopper.
10. For each trial, calculate the Fg of the each trial of hanging weights (use 9.8m/s² for a_g!). Since this is the F_T on the string, this represents the IDEAL F_C.
12. Determine the percent error of each trial by comparing the ideal F_ccreated by the hanging weights to the experimental F_c .

Can you also help me find the circumference of the circle

Mass of Hanging Weight	Tangential Velocity (m/s)	Gravitational force (N)	Centripetal force (m/s2)	Percent error (%)
50 g	5.4 m/s	0.49
70 g	6.5 m/s	0.69
90 g	7.6 m/s	0.88
110 g	8.2 m/s	1.08
130 g	8.8 m/s	1.27
150 g	9.1 m/s	1.47

Time of 10 revolutions

50 g = 8.38 s

70 g = 6.93 s

90 g = 5.94 s

110 g = 5.53 s

130 g = 5.17 s

150 g = 4.98 s